Download or read book Material Characterization of Li ion Battery Segments Subjected to Lateral Compression and an In plane Tension Loads written by Sagy Hakoon and published by . This book was released on 2017 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last two decades, Lithium-ion (Li-ion) batteries have become an inherent part of day-to-day life thanks to their widespread use in many consumer products and electric vehicles. While these batteries possess great advantages, they also carry an inherent safety liability: In case of a crash event, short-circuit failure of the battery may develop, leading to thermal runaway, fires and even explosions. Hence, a comprehensive study is required, aimed to modulate these batteries and optimize their testing standard. The objective of this research was to characterize the effect of lateral compression on the in-plane tensile failure load of Li-ion battery segments. A new experimental system was developed, which allows fine control of the compression load, and decouples the out-of-plain compression load and the in-plain tension load. Then, measurements were conducted with single-layer, 4-layers and 11-layers specimens, producing characterizing graphs of the tensile load versus displacement. For all types of specimens, results show an observable decrease in the failure load for increasing pre-compression load, as expected. Furthermore, measurements confirmed that the relation between the tensile load and the displacement does not change for different compression loads. For the multi-layer specimens (4 layers), the failure sequence was studied. It was found that the sequence may alter for different pre-compression loads. Nevertheless, on all cases, the cathode failed first, and the anode failed second. Throughout all experiments, failures were located on the edge of the compression area of the specimen. Several methods were used to encourage emergence of failure at the center, but with no success. A hypothesis to explain the development of this mode of failure is suggested at the end of this work.

Download or read book Combined Tensile compressive Biaxial Loading of Li ion Battery Components written by Nathaniel Joseph Byrd and published by . This book was released on 2018 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium-ion batteries under a mechanical load can develop failures in the internal multi-layer structure. Due to the flammable materials required for construction, the safety of the battery has been in question since it was first developed. Internal failures can create a short circuit which may lead to thermal runaway, resulting in fire and sometimes the explosion of the battery. Due to the increasing use of lithium-ion batteries in military and consumer products, the number of incidents involving batteries has also risen and with it a growing concern for safety. The larger batteries required for unmanned vehicles and electric vehicles increase the potential for damage due to a battery fire aboard a ship or a battery damaged in a collision. This thesis investigates the failure mechanism of internal lithium-ion battery components when subject to a constant out-of-plane compression while applying and increasing a decoupled in-plane tension until failure. This thesis also describes the methods used to optimize the mechanical system designed to apply constant compression while increasing tension. The results will be used to characterize and anticipate the effect of lateral compression on the failure load of lithium-ion battery cells. The existing microstructural based finite element model can be modified to the experimental conditions in this thesis in order to compare the experimental and modeled results. This comparison will be used to refine and validate the micro model and ultimately bring us closer to improving the design of lithium-ion batteries. Experimental results showed there is a quantifiable relationship between the amount of pre-compression internal battery components are exposed to and the maximum failure load. In the tested 0 to 30 MPa compression range was a 40% reduction in fracture displacement and a 20% reduction in load displacement. The change in failure order, predicted by the micro model was validated by this experimental data. However, failure did not occur in the area of compression which indicates friction due to the compression had a significant effect on testing therefore a design to eliminate friction was proposed.

Download or read book Development of a Representative Volume Element of Lithium ion Batteries for Thermo mechanical Integrity written by Richard Lee Hill (Sr.) and published by . This book was released on 2011 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of Lithium-ion batteries continues to grow with the introduction of more electronic devices, electric cars, and energy storage. Yet the optimization approach taken by the manufacturers and system designers is one of test and build, an approach that nearly every other industry has long abandoned. A computational model is required to reduce the expensive build-test cycle and allow safer, cheaper batteries to be built. The path to building this computational model will involve many different processes and one of those processes dictates the homogenizing of the interior of the battery casing by treating the interior as a homogenized Representative Volume Element. This study explains this process and outlines a procedure for the development of this particular model for both cylindrical and prismatic / pouch cells. Over twenty different mechanical tests were performed on fully-discharged cylindrical and pouched / prismatic lithium-ion batteries, in casings and without casings under multiple loading conditions. These included lateral indentation by a rod, axial compression, through-thickness compression, in-plane unconfined compression, in-plane confined compression, hemispherical punch indentation and three-point bending. Extensive testing on the battery cell and jelly roll of 18650 lithium ion cylindrical cell, combined with the use of analytical solutions to estimate material properties of the cell, yielded the development of a finite element model. It was found that the suitably calibrated model of high density compressible foam provided a very good prediction of the crash behavior of cylindrical battery cell subjected to high intensity lateral and axial loads. For the prismatic / pouch cell, the measured load-displacement data allowed calculation of the individual compression stress-strain curves for the separator, the active anode and cathode materials. The average stress-volumetric strain relation was derived from averaging the properties of individual layers as well as from direct measurement on the bare cell. This information was then used as an input to the FE model of the cell. The model was composed of shell elements representing the Al and Cu foil and solid elements for the active material with a binder lumped together with the separator. Very good correlation was obtained between LS-Dyna numerical simulation and test results for the through-thickness compression, punch indentation and confined compression. Closed form solutions were also derived for the latter three problems which helped explain the underlying physics and identified important groups of parameters. It was also demonstrated that a thin Mylar pouch enclosure provided considerable reinforcement and in some cases changed the deformation and failure mechanism. This paper reports on the results generated for the Li-ion Battery Consortium at MIT.

Download or read book Material Characterization and Axial Loading Response of Pouch Lithium Ion Battery Cells for Crash Safety written by Amber J. Mason and published by . This book was released on 2017 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research conducted at MIT's Impact and Crashworthiness Laboratory (ICL) has focused on material characterization of lithium ion battery cell components for use in the development of an accurate and practical computational model intended to predict mechanical deformation and related short circuit behavior of Li-ion battery cells and stacks in real world impact scenarios. In an effort to continue to refine and validate this modeling tool, characterization testing was conducted on battery cell pouch material using uniaxial stress and biaxial punch tests. At the full cell level, hemispherical punch indentation validation testing and internal electric short circuit testing was conducted on large, high energy pouch cells. Further investigations at the full cell level examined the buckling response of small pouch cells as a result of in-plane axial compression under varying degrees of confinement. To this end, a custom testing device was designed and constructed to provide controllable cell confinement for axial loading experimentation purposes. All experimentation results will feed into a computational model of the cell extended for use in comprehensive mechanical deformation simulation modeling.

Download or read book High Energy Density Lithium Batteries written by Katerina E. Aifantis and published by John Wiley & Sons. This book was released on 2010-03-30 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Engineering for High Density Energy Storage provides first-hand knowledge about the design of safe and powerful batteries and the methods and approaches for enhancing the performance of next-generation batteries. The book explores how the innovative approaches currently employed, including thin films, nanoparticles and nanocomposites, are paving new ways to performance improvement. The topic's tremendous application potential will appeal to a broad audience, including materials scientists, physicists, electrochemists, libraries, and graduate students.

Download or read book The Effects of Internal Stress and Lithium Transport on Fracture in Storage Materials in Lithium Ion Batteries written by Klinsmann, Markus and published by KIT Scientific Publishing. This book was released on 2016-03-08 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture of storage particles is considered to be one of the major reasons for capacity fade and increasing power loss in Li-ion batteries. In this work, we tackle the problem by merging a coupled model of mechanical stress and diffusion of Li-ions with a phase field description of an evolving crack. The novel approach allows us to study the evolution of the Li concentration together with the initiation and growth of a crack in an arbitrary geometry and without presuming a specific crack path.

Download or read book Lithium Ion Battery Materials and Engineering written by Malgorzata K. Gulbinska and published by . This book was released on 2014-09-30 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization and Prevention of Failure Modes of Lithium Polymer and Lithium Ion Batteries in Transportation Applications written by Karim Zaghib and published by The Electrochemical Society. This book was released on 2007-11 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers included in this issue of ECS Transactions were originally presented in the symposium ¿Characterization and Prevention of Failure Modes of Lithium Polymer and Lithium Ion Batteries in Transportation Applications¿, held during the 211th meeting of The Electrochemical Society, in Chicago, IL.

Download or read book Lithium Ion Batteries and Beyond written by K. Amine and published by The Electrochemical Society. This book was released on 2015-07-29 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Structuring of Graphite Anodes for Functionally Enhanced Lithium Ion Batteries written by Jan Bernd Habedank and published by utzverlag GmbH. This book was released on 2022-01-21 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Characterization of Lithium ion Battery Micro Components for Development of Homogenized and Multilayer Material Models written by Kyle Mark Miller and published by . This book was released on 2014 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall battery research of the Impact and Crashworthiness Laboratory (ICL) at MIT has been focused on understanding the battery's mechanical properties so that individual battery cells and battery packs can be characterized during crash events. The objective of this research is to better understand the battery component (electrode and separator) properties under different loading conditions. In this work, over 200 tests were conducted on battery components. These tests include uniaxial stress, biaxial punch, multilayer, single layer, short-circuit testing, wet vs dry specimen testing, strain rate testing, and more. Additionally, a scanning electron microscope was used to view the battery components at a micro level for the purpose of better understanding the aforementioned test results. During these tests, it was observed that many of the electrodes in the Li-ion batteries are damaged during the battery manufacturing process. Also, the two methods of manufacturing battery separator were analyzed and their resulting mechanical properties were characterized. These results will be used to further refine and validate a high-level, robust, and accurate computational tool to predict strength, energy absorption, and the onset of electric short circuit of batteries under real-world crash loading situations. The cell deformation models will then be applied to the battery stack and beyond, thereby enabling rationalization of greater optimization of the battery pack/vehicle combination with respect to tolerance of battery crush intrusion behavior. Besides improving crash performance, the finite element models contribute substantially to the reduction of the cost of prototyping and shorten the development cycle of new electric vehicles.

Download or read book Characterization of Mechanical Stress Effects on Lithium ion Battery Materials written by Christina A. Peabody and published by . This book was released on 2011 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lithium ion battery cells and systems under dynamic electric loads written by Martin Brand and published by Herbert Utz Verlag. This book was released on 2018-11-08 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book All Solid State Thin Film Lithium Ion Batteries written by Alexander Skundin and published by . This book was released on 2021 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The monograph is intended for teachers, researchers, advanced students as well as for developers and manufacturers of thin-film lithium-ion batteries (LIB). The monograph contains an overview of developments in the field of materials, technologies and diagnostics of integral LIBs. It describes the basic principles of thin-film LIB functioning and considers their electrochemical systems. The characteristics of electrode materials and solid electrolytes are provided. Methods of deposition of thin-film LIB functional layers, methods for manufacturing test structures and methods for testing LIBs, and their individual elements are considered. The methods of diagnostics of thin-film LIB materials and the features of their investigation by means of electron microscopy, X-ray phase analysis, probe microscopy, mapping, secondary ion mass spectrometry, Auger spectrometry and IR spectroscopy are discussed"--

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization of Advanced Materials for Lithium ion Batteries written by Rachid Amine and published by . This book was released on 2009 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Lini0 6mn0 35co0 05o2 and Li2fesio4 C As Electrodes for Rechargeable Lithium Ion Battery written by Pengda Hong and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Synthesis and characterization of LiNi0.6Mn0.35Co0.05O2 and Li2FeSiO4/C as electrodes for rechargeable lithium ion battery" by Pengda, Hong, 洪鹏达, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: The rechargeable lithium ion batteries (LIB) are playing increasingly important roles in powering portal commercial electronic devices. They are also the potential power sources of electric mobile vehicles. The first kind of the cathode materials, LiXCoO2, was commercialized by Sony Company in 1980s, and it is still widely used today in LIB. However, the high cost of cobalt source, its environmental unfriendliness and the safety issue of LiXCoO2 have hindered its widespread usage today. Searching for alternative cathode materials with low cost of the precursors, being environmentally benign and more stable in usage has become a hot topic in LIB research and development. In the first part of this study, lithium nickel manganese cobalt oxide (LiNi0.6Mn0.35Co0.05O2) is studied as the electrode. The materials are synthesized at high temperatures by solid state reaction method. The effect of synthesis temperature on the electrochemical performance is investigated, where characterizations by, for example, X-ray diffraction (XRD) and scanning electron microscopy (SEM), for particle size distribution, specific surface area, and charge-discharge property, are done over samples prepared at different conditions for comparison. The electrochemical tests of the rechargeable Li ion batteries using LiNi0.6Mn0.35Co0.05 cathode prepared at optimum conditions are carried out in various voltage ranges, at different discharge rates and at high temperature. In another set of experiments, the material is adopted as anode with lithium foil as the cathode, and its capacitance is tested. In the second part of this study, the iron based cathode material is investigated. Lithium iron orthosilicate with carbon coating is synthesized at 700℃ by solid state reaction, which is assisted by high energy ball milling. Characterizations are done for discharge capacities of the samples with different carbon weight ratio coatings. DOI: 10.5353/th_b4715029 Subjects: Lithium ion batteries Cathodes Lithium compounds - Synthesis Cobalt compounds - Synthesis Manganese compounds - Synthesis Silicon compounds - Synthesis Iron compounds - Synthesis